James walker



J. WALKER.

- ROD PACKING.

(No Model.)

Patented Feb/24,1891.-

WITNESSES.-

-e ww NITED STATES PATE T OFFICE.

JAMES XVALKER, OF LONDON, ENGLAND.

ROD-PACKING.

SPECIFICATION forming part .of Letters Patent No. 447,170, dated February 24, 1891. Application filed September 9, 1890. Serial No. 364,413. (No model.) Patented in England March 9, lSSINo. 3,675.

To aZZ w/wm it may concern.-

Be it known that 1, JAMES WALKER, of London, in the county of Middlesex, England, have invented a new and Improved Rod- Packing, (for which I have obtained a patent for Great Britain, No. 3,675, and bearing date of March 9,1888,) of which the following is a full, clear, and exact description.

My invention relates to improvements in rod-packing; and the object of my invention is to produce a packing of great elasticity that will successfully resist the great heat of high-pressure steam in triple-expansion englues.

My invention consists in the construction which will be hereinafter fully described, and specifically pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a broken perspective view of a piece of packing embodying my invention, a part being broken away to show the construction of one of the metal pins in the packing. Fig. 2 is a View of the packing in cylindrical form. Fig. 3 is a cross-section of the same on the line 3 3 of Fig.2. Fig. t is a broken perspective view of the packing in the form of a spiral. Fig. 5 is a packing in rectangular shape. Fig. 6 is a cross-section of the same on .the line 6 6 of Fig. 5; and Fig. 7 isa transverse section of a piece of cylindrical packing, but with one of the fastening-pins extending only partially through it.

The packing is formed of asbestus cloth woven with metallic wire, the cloth being As shown in Fig. 1, the packing A is made up of the endless folds a, which have been constructed and treated as described above, and the folds are fastened together by the pins B, which are driven into the packing, the pins being wedge-shaped, as shown, with their larger ends on the side of the packing that is to come next to the piston or gland rod, as the case may be, and it will be observed that any desired number of pins may be used to make the packing as metallic as possible, and the wire and asbestus cloth give the packing a spring the other way by the pressure of the gland-cover.

As shown in Figs. 2, 3, and 7, the packing A is rolled up into cylindrical form and is fastened by pins 13, which extend through the packing-roll, or by pins 1), as shown in Fig. 7, which extend only partially through the roll.

As shown in Fig. 4, the packing A is made up in the form of a'spiral, the folds being held by suitable pins 1), and this form enables it to be conveniently wrapped around a rod. In Figs. 5 and 6 the packing A is made up in rectangular form, and the folds a of the packing are held by suitable pins B.

The packing may be made with asbestus or other suitable material, with wire-gauze or other metallic material put between to produce the same result, and the pins or wire may be sewed through the packing in a wavy form to act as a springthe side way or deep way. It will be observed that the packing may be laid in layers instead of folds and fastened by pins in the manner described.

Having thus fully described myinvention, I claim as new and desire to secure by Letters Patent 1. A packing formed of metal and fibrous strands interwoven into a sheet and folded bellows like into layers, and metallic pins embedded in the packing and exposed on the working-face thereof, the folds to open to the steam, substantially as set forth.

2. A packing-strip formed of asbestus and wire strands interwoven into a sheet, said sheet being folded bellows like into a strip of suitable length, and the metallic pins en1- bedded in the Working-face of the strip, the folds to open to the steam, substantially as set forth.

3. A packing-strip formed of a sheet of interwoven asbestos and Wire folding bellows like into a strip, an external coat of rubber over said strip, and metal pins embedded in 

